Activating a shopping cart module

Go to the "My account" page of your e-commerce catalogue website and click on the shopping cart module you want to be provided on your website, in that example the "Clothes sizes selection" module. Clicking the module selects it. Click on the "Save modifications" button:

A drop down list has now taken place over every "Add to cart" button on the products pages of your e-commerce website (you will learn in the next pages of the present documentation how to select a few products only for which the shopping cart module applies):